Improvement in machines for sewing boots and shoes



Z'Sheet s-Sheet I.

s; HENSHALL. DR SEWING BOOTS AND SHOES.

MACHINE 60.

Patented March 13 2-Sheets-Sheet 2. S; HENSHA'LL.

MACHINE FOR SEWING'BOOTS ANDSHOES. No. 188. I Patented MarphlS, 1877.

N FETEKS. PHOTU-LITHQGHAFHER, WASHINGTON. D C.

; ITED STATES PATEN sAMUEL HENsHALn oE PHILADELPHIA, PENNSYLVANIA.

Specification forming part of Letters Patent No. l8,360, dated March 13,1877; application filed 2 December 16, 1876.

To all whom it mag concern:

Be it known that I, SAMUEL HENSHALL, of

Philadelphia, Pennsylvania, have invented were granted to George Walterson the 8th day of April, 1873; and the main object of my improvements isto adapt said machine to the sewing of shoes-an object which I attain-in the manner hereinafter described, reference being had to theaccompanying drawings, in which- Figure 1, Sheet 1, is a sideview,partly in section, of my improved shoe-sewin g machine; Fig. 2, a planview, partly in section; Fig. 3, Sheet 2, longitudinal section of thefront end of the machine; Fig. 4, a sectional plan of the front end ofthe machine; Fig. 5, a plan view of the looping-arm; Fig. 6, a side viewof a portion of the machine; and Figs. 7, 8, 9, and 10, diagramsillustrating the formation of the stitch.

A is the frame-work of the machine, and B the driving-shaft, the lattercarrying two scroll-cams, a and b, a bevelwvheehc, and a cam-wheel, d,which serve to impart movement to the various working parts of themachine in the following manner: A crank-pin on the face of thecam-wheel d'is connected, by means of a rod, 6, to a slide, f, securedto the needle-bar D, the lattercarrying a hooked needle, E, to which therequired vertical reciprocating'movement is thus imparted as thecam-wheel d revolves. The edge of the camwhe'el (1 acts upon ananti-friction roller car-' ried by a slide, g, secured to' the lower endof a spring-rod, F, carrying at its upper end a block, g, to which ispivoted the upper end of a plate, I, the lower'end of the latterextending down to a point adjacent to the base of the machine, and beingprovided with a jaw, 'z'.

Immediately adjacent to the face of the plate I' is arranged a similarplate, J, which vcarries at its lower end a jaw, 17, is guided by lugson the plate 1, and is vibrated with the same, as described hereafter,but is chine;

ger, m,

entirely independent of the said plate I in its vertical movement, as itis slotted vertically at the top Where the pivot-pin passes through it,and receives its vertical movement from the block g',through the mediumof the lever Gr, vertical bar H, and connecting-plate h, the latterhaving a curved slot to permit the vibration of the plate. I

It will thus be seen that vertical movements in opposite directions areimparted, to

the plates I and J, thelatter falling when the other rises, and viceversa.

In the above-mentioned patented machine the work was supported by thebed in the same manner as in an ordinary sewing-mabut in operating uponshoes this is not permissible, as it would interfere with the proper andeasy manipulation of the shoe; hence I use for this purpose a projectingfinwhich, in the present instance, forms part of a bell-crank lever, L,and is arranged in line vertically with the needle-bar, being perforatedfor the passage of the needle.

The bell-crank lever L, of which the finger m forms-a part, is hung to abracket on the frame of the machine, and its short arm is connected to arod, k, the opposite end of which carries an anti-friction rolleradapted to the groove in the scroll-cam a on the driving-shaft, thisgroove being of such a character that the movement hereinafter describedwill be imparted to the finger m.

The long arm of the bell-crank lever carries a spring lasting-arm, n,which has at the outer end a roughened block for hearing against theedge of the upper, and holding the same firmly against the sole when theshoe is being sewed, as shown in Fig. 6.

The bevel-Wheel c on the driving-shaft imparts motion to twobevel-pinions, s and t, the former being carried by .the lower end of avertical shaft, S, and the latter by the upper end of a vertical shaft,T. E

The shaft S carries at its upper end a disk, V, having in its under sidea cam-groove, '0, (see 'Fig. 2,) to which is adapted a pin' on a slidingplate, B, the forked inner end of which embraces a collar on the shaft,while its outer end is provided with a rack adapted to the teeth of apinion, 12, connected to the needlebar D, in such a manner that thelatter can slide freely in, .but cannot revolve independently of, thesaid pinion.

The character of the cam-groove in the disk V is such that ahalf-revolution in opposite directions is imparted to the needle barduring its vertical movement, as described hereafter.

The shaft T carries at its lower end a disk, u, having acrank-pinconnected to the inner end of the looper-arm W, the latter having at theouter end an eye, .10, for the passage of the thread, and beingconnected at any desired point to a radius-arm, U, pivoted to the baseof the machine, so that a circular move,

ment is imparted to the eye as at the outer end of the arm.

It will be observed that the relative size of the wheel, 0 and pinion tis such thattwo revolutions of the shaft T, and, consequently, twooperations of the looper-arm, are made during every revolution of thedrivingshaft, and, consequently, during every complete up-and-downmovement of the needle. This is done in order that the movement of theeye :1: around the end of the needle when the latter is down shall beabrupt, so as to drawthe thread against the needle, and in sure itsbeing caught on the hook as the latter ascends.

The scroll-cam b on the driving-shaft B acts on a connecting-rod,1',attached at the outer endto the end of an arm, X, on the rear end of arock-shaft, Y, the latter turning in bearings at the side 'ofthe frame,and carrying at its front end an arm, X, to asegmental slot in which isadapted a bolt, 3 having a thumb-nut, and connected to the outer end ofa rod, 2, the inner end of which is connected to the plate I, to which avibrating motion is thus imparted, the extent of vibration beinggoverned by the position of the bolt 3 in the slot of the arm X.

The operation of the machine is illustrated in Figs. 7,8, 9, and 10, andis as follows: Supposing the needle E to be elevated, the finger mdepressed, and the jaws '5 i1 drawn back to their fullest extent, andclosed on the work, the jaws now move forward, carrying the work withthem, and the needle descends, laying the thread which was caught on itsbook down on the face of the work in the form of a loop, as shown inFig. 8, down through which and through the work the needle passes.Before the needle commences to pass through the work, however, theoperation of the machine causes the raising of the finger m, which thussupports the work when the pressure of the needle is exerted upon it.The needle descends, and a loop of thread is wrapped around it bythe'eye a; of the looper, and catches on its book. As the needle risesit is caused to turn half-way round, its hook being thrown back, asshown in Fig. 9, so that as it rises and passes through the work, andthe loop on the top of the same, the latter will not catch on the book,but will be cast 01f, the needle continuing its upward movement, andduring this movement haying'a reverse rotary motion imparted to it, soas to bring its book again to the front, as shown in Fig. 10.

Such a movement is then imparted to the plates I and J that the jaws '11and 'i are caused to open and release the work, which is then supportedby the finger m, while the jaws move backward and close on the work, inthe manner shown in Fig. 7. As soon as the jaws have closed and commenceto move forward, the finger m is depressed, so as to be out of the wayand not interfere with the free feeding of the work; but as soon as thejaws have reached the limit of their forward movement the finger ascendsand supports the work during the operation of the needle, as abovedescribed.

If the thickness'of the upper which is be ing sewed to the sole varies,the lasting-arm n is at liberty to yield longitudinally to accommodateitself to such a difference in thickness, the spring which acts, uponthe arm causing it to keep the edge of the upper in its proper positionwithout interfering with this longitudinal movement.

It will be observed in Figs. 1, 3, and 6 that the lower jaw i isrecessed, while the upper jaw has a sharp V-shaped edge. By this meansthe lower jaw affords a firm bearing for the edge of the sole, while theupper jaw enters into the thread-slot cut in the sole, and thus servesas a guide for feeding the shoe to the machine, and insures the properlaying of each stitch in the slot, which it has a tendency to open forthis purpose.

I claim as my. invention 1. The combination of thefeeding-jawsj 'i andthe movable finger m with devices whereby the said finger is depressedwhen the jaws are in the act of feeding.

2. The combination of the spring lastingarm n with the finger m, the twopresenting a recess for the reception and guidance of; the upper andsole, as set forth.

3. The combination of the finger m, bellcrank lever L, connecting-rod k,and scrollcam a.

4. The combination of the feeding-jaws i and 13 withthesupporting-finger m, in advance and independent of said jaws, wherebythe manipulation and feeding of the work is facilitated, as set forth.

5. The combination of the spring rod F and its block g, and thevibratingplate J, with the lever G, bar H, and connecting-plateh, as set forth.

6. The combination of the needle-bar D and pinion 12, connected togetheras described, with the sliding plate R and its rack, and the disk V,with the cam-groove o.

In testimony whereof. I have signed my name to this specification in thepresence of two subscribing witnesses.

Witnesses: SAMUEL HENSHALL.

HERMANN MOESSNER, HARRY SMITH.

